<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="vieport" content="width=device-width,initial-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie-edge">
        <title>Vue</title>
    </head>
    <body>
        <div id="app" class="bpp">{{message}}</div>
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js">
        </script>
        <script>
            var app=new new Vue({
                // el:"#app",
                // el:".bpp",
                el:"div",
                data:{
                    message:"Hello vue!"
                }
            })
        </script>
    </body>
</html>